Door lock



Aug. 17, 1948. I A. F. LICKT EIG 'noon LOCK Filed Oct. 8, 1945 3Sheets-Sheet 1 I \nuenfor Afiornegg Aug. 17, 1948. A. F. 'LICKTEIG DOORLOCK 5 Sheets-Sheet 32 Filed Oct. 8, 1945 Fi A.

I \puanfor mum FLickfei w UOM- mfornegg Patented Aug. 17, 1948 t is.FFICE DflOR LOCK Albert F. Lickteig, Grand Rapids, Mich, assignor toNational Brass Company, Grand Rapids, Mich, a. corporation of MichiganApplication (Bctober 8, 1945, Serial No. 621,121

Claims. 1

This invention relates to door locks. It is more particularly concernedwith what in the trade is known as a dead locking night latch, one whichautomatically looks when a door is closed and must be released from theoutside by use of and key, with, however, a provision of novel means forsecuring the lock bolt in a retracted inoperative position, so that thedoor may bereadily opened and closed without the use of a key.Furthermore, such look, when the door is closed and the lock-must bereleased from the outside by use of a lacy, may be quickly and easilyreleased from the inside by a simple, manually operable means.

The present invention has for its objects and purposes, among others,the production of a lock of the character stated, which is sure andcertain in its operation, is very simply and readily installed on adoor, has parts, the major portions of which may be made from sheetmetal stampings which are economical toproduce, and in which assembly ofthe parts and their installation on a door may be performed in a simpleand very practical manner.

An understanding of the invention may be had" from the followingdescription, taken in connection with the accompanying drawings inwhich,

Fig. i is a horizontal section through the lock of my invention with theinterior parts thereof shown in plan, the lock being shown as installedat the free vertical edge of a door.

Fig. 2 is a longitudinal, vertical section and side elevation of thelock in the projected position of the bolt when the door is open.

Fig. 3 is a transverse, vertical section substantially on the plane ofthe bro-ken line 3-3 of Fig. looking in the direction indicated.

Fig. 4 is a view, similar to Fig. 2, with the lock in the position itoccupies when the door is closed and the head of the lock bolt isengaged with a keeper or strike plate.

Fig. 5 is a view, similar to Figs. 2 and 4, showing the initial changein the position of the parts upon the beginning of retraction of thebolt, either by an outside key or the inside manually operable means.

Fig. 6 is a View, similar to those shown in Figs.

2, 4, and 5, showing the position of the parts of the look when thelatch bolt has been retracted to release the door.

Fig, 7 is a fragmentary, transverse vertical section through the boltoperating means in a plane parallel to a side of the door. 7

Fig. 8 is a View, similar to those shown in Figs.

sea-ice) 2 2, i, 5 and 6, showing the bolt fully retracted and held inretracted position.

Fig. 9 is a fragmentary horizontal section showing the latch with thebolt thereof engaged with the keeperor strike plate on the door frame orjamb.

Fig. 10 is a transverse, vertical section through the latch structure,the plane of said section being outwardly of the plane of the sectionshown in Fig. 3, and

11 shows in perspective, the interior parts oi the latch structuresubstantially in disassembled relation.

Like reference characters refer to like :parts in the different figuresof thedrawings.

The door in the installation of the lock of the present invention, atits free edges has a cylindrical opening 2 bored therethrough for therequired distance, and through the door at a'distancc inwardly from itsfree edge, transverse openings 3 are out or bored which are" incommunication with'the interior opening 2 toward its inner end, as shownin Fig. 1.

The lock structure includes an outerhousing made of two parts stampedfrom sheetmetal, the forward portion of each of which is 01 asubstantially semi-cylindrical form as shown at 4, and the rear portionof a channel form in cross section, indicated at 5, the inner ends beingturned inwardly toward each other to provide flanges 6, which may besecured together in any suitable manner, as for example as shown in myearlier application Sci. No. 549,644, filed August 16, 1944, now PatentNo. 2,423,988, dated July 15, 1947. At its front end each of the partsof the housing is slightly reduced in diameter, as at l, and when thetwo parts of the housing are brought with their edge portions in contactengagement, a cylindrical wall 8 of a cup shaped member having a bottom9 is telescoped over the reduced outer end portions 7' and is detachablyconnected in a well known manner. At the outer side of the bottom 9 arectangular plate ll! of flat material is spot welded or otherwisepermanently secured, and both said bottom 9 and the plate It! 'haveopenings in conjunction with each other for the passage of the head ofthe lock bolt and of another member, which will be hereinafterdescribed. Such housing with the lock mechanism therein, when installedon the door, is passed intothe opening 2 until the outer end plate Itcomes against the outer free edge of the door and is received in ashallow morticed recess therefor and secured to the door in the usualmanner, ordinarily by screws.

The key and other means for unlocking and operatingthe latch boltincludes in its assembly structure an escutcheon l i, with an openingtherethrough at the outer side of which may be a cover plate l2 with aninner steel plate case hardened to .prevent drilling the look from whichtwo spaced apart rods l3 extending through the opening in the escutcheonand thence through the openings 3 nearly to the inner side of the door.The inner end portions of the rods I3 are interiorly bored and threaded.Said rods l3 pass through suitable holes made in the sides of the rearchannel sections of the housing.

At the inner side of the door, a plate I4 is located, covering the inneropening 3 and screws I5 pass through said plate threading into theadjacent ends of the rods Hi to bind the parts together against theinner and outer sides of the door (see Fig. 1). A key operated look |6is connected to the inner side of the member 2 and extends through theopening 3 at the outer side of the door to the interior opening 2therein. Such lock is key operated by a key shown at H. Said lock inaccordance with Well known construction, has a barrel which may berotated by the key within the outer cylindrical housing of the lock, tothe inner end of which a disk It; is permanently connected to turntherewith. The disk has an inwardly extending annular flange, fromdiametrically opposite sides of which tongues l9 extend and are benttoward each other over the edges of a second disk 29 (Fig. 1) which isheld in place by the tongues l9, and from which two opposed fingers 2|project permittin limited freedom of movement of the disk 20 withrespect to the disk It! provided by the construction described. However,upon key operation of the lock, the disk I8 is turned, and it will serveto turn the disk 20 upon the inbent fingers |9 coming against thefingers 2|.

A flat bar 22 rectangular in cross section is connected at one end tothe disk 20 and passes through the opposite sides of the locking housing5 and nearly to the inner side of the door. On the plate M a manuallyoperable head 23 having a longitudinal slotted shaft 24 connectedtherewith is mounted for rotation, the shaft extending through the plateand the free end of the bar 22 being received within the slot of theshaft 24. Thus the bar 22 may be turned by either key turning the lockfrom the outer side of the door, or by a manual turning of the shaft 24by means of the head 23 located at the inner side of the door.

A plate 25 of flat metal is provided at its lower edge with a downwardlyprojecting portion 26 and at its upper edge with a projecting portion 21formed as best shown in Fig. 11. This plate is located verticall withinthe housing and the parts of the housing. The front edge of the plate 25is located back of the outer end of the housing a distance substantiallyequal to the length of the bolt head, which will subsequently bedescribed. At its rear edge, approximately midway between its upper andlower edges, the plate has a laterally turned ear 2B and at its lowerrear corner portion a rearwardly extending ear 29, substantially inhorizontal alinement with which, and a short distance back of the frontedge of the plate, a rectangular opening 30 is made.

The bolt head 3| is rectangular in cross section except that at itsouter corner it is cut away to provide an inclined cam surface 32 in theusual manner. A plate of flat metal 33 is secured to and extends intothe housing from the rear end of the bolt head, having upper and loweredge portions extending above and below the upper and lower sides of thehead 3|. The plate is extended at its rear in a horizontal arm 34 at theextreme rear end of which a finger 35 extends downwardly at rightangles, which may at its end have an inclined edge 35, A second finger37 extends downwardly from the arm 34, spaced from and forward of thefinger 35, with a downwardly and inwardly inclined forward edge 33, therear edge of the finger 31 and the front edge of the finger 35 beingvertically disposed. The plate 33 immediately back of the head 3| is cutaway at its lower edge as shown, providing two spaced apart upwardlyextending notches or recesses 39, between which is a downwardlyextending portion 40 and with fingers 4| and 42 extending downwardly agreater distance than the part 65 at the front of the front notch and atthe rear of the rear notch 39 respectively, as best shown in Fig. 11. Acoiled compression spring 33 at its rear end bears against the laterallyturned ear 28 on the plate 25 and at its front end against a lateralextension 44 on the bolt head (Fig. 1). Such spring normally tends tomove the bolt head and the attached bolt plate 33 outwardl to theposition shown in Figs. 1, 2, 4, 5 and 9.

A cylindrical bar 45 with a substantially semicylindrical projection 45at its front end as shown,

'is positioned with the flat side of the part 45 hearing against a sideof the head 3|. The shoulder between the parts 45 and 45 comes againstthe rear end of the head 3| when free to do so, in which position theouter end of the head 3| and semi-cylindrical projection 45 are flushwith each other. It is to be noted that on the opposite sides of thehousing parts 4, outwardly extending partial longitudinal cylindricalembossings 4a and 4b are provided for the reception and guidance of thecylinder 45 and the spring 43 (Fig, 10). The cylinder member 45 at itslower side and between its ends has a portion cut away, providing arelatively shallow elongated recess 41 which at its rear end at leasthas a downwardly and rearwardly inclined side. The cylinder is boredfrom its rear end forwardly to make a longitudinal opening 48.

A lever member 49 made from fiat metal is pivotally connected betweenits ends at 53 to the ear 29 (Fig. 11). It is provided with a laterallyturned ear 5| above the pivot 50 which is turned in an oppositedirection from the ear 2%. The rear or inner portion of the lever isslotted with a curved slot 52 closed at both ends and at each end havingan upwardly extending shallow branch slot 53. The forward arm 54 of thelever extends alongside the plate 25 and has a tongue 55 turnedlaterally from its upper edge to pass through the opening 38 in theplate 25 which at its free end, terminates in an upwardly turned lip 56,and which in the assembly of the parts lies directly below the lowerside of the cylindrical member 45 and in most positions of said memberbelow therecess 47, The forward arm 54 is eX- tended still furtherforward and at its front end is provided with a laterally turned part51. A light coiled spring 58 at its front portion is r ceived within theopening 48 of the cylinder 45, and at its rear portion is passed over arod 59 which, at its rear end, bears against a collar 56 on the rod, therod back of said collar passing through an opening in the ear 5|. Thespring 53 normally tends to move cylinder 35 in an outward direction butis readily yieldable so that the cylinder 45 may be moved inwardly. Suchspring 528 also has ainormal tendency to turn the lever 4.3 a clockwisedirection about the pivot 5.0.

The r ar portions of. the arms. 43 and 34 he alon side each o her andare located between he nricsitcsi es of the inner or rear channelpertiens of the lo k housin (Fig. l). A bolt r tractin el ment isprovided, made. from sh et metal. havin two spaced apart par l el. sidesor arms 6! conn cted a one end by an inte ral crossbar 62 an at the roth r ends by a min which carries a rol er- 63. the roller passin throuh the. slot 52. and between the ng rs. 3.5 and 31 of the arm 34.. said ams 6.! are. elm bossed outwardly adjacent their nds opposit said roller,as shown at 64.. providin bearin portions which are mounted for rockingmovem nt. in. suitable op nin s in the sides of the rear channelsections 5 of they housing. Said bearin embossings so have rectangularslots. 6.4a therein through which the bar 22 previously describedpasses, whereby on turning said bar about its longitudinal axis eitherby the key i! or head scthe bolt member 34. isv retracted irom theposition shown in Fig. 2 to that shown in Fig. 6 forrelease of the door.

A spring lid is fixed at one end to a side of the housing and extendsthereacross to the opposite side, the opposite end'of the spring havinga freedom of movement in an opening or slot cut the housing for suchpurpose. Near said ope posite, free end of the spring it isgformed witha forwardly bent triangular portion 6512. against which the rear edge ofthe finger engages upon sufficient inward retraction of the latch bolt,as shown in Fig. 6, and upon such further or. extreme retraction of thelatch bolt the spring is moved inwardly from the position in Fig. 6 tothat shown in Fig. 8.

The latch structure described and as thus assembled is mounted upon adoor and normally the parts will occupy the position shown in Figs. 1and 2 when free to do so. The door mounted for swinging movementat thedoor opening is adapted to have its free edge portion, when the door isclosed, opposite the inner casing or jamb 66, in which an opening 61 ismade at the proper position for the reception of the projecting end ofthe latch bolt 3|. Over said opening 6.? a. strike. plate 63 is. securedwith an opening therein sufficient only for the free passage of thelatch bolt head 3!, but against which the outer end of thesemi-cylindrical ex? tension as of the cylindrical member engages sothat when the door is in a closed position the bolt and the cylindricalmember 45 are disposed as shown in Fig. 9..

It is evident that with the described structure of latch and with theparts occupying their normal position as in Fig. upon the door beingclosed the inclined cam side 32 of the bolt head riding against thestrike plate 68 causes the bolt head to be forced inwardly against thecompression spring as and, simultaneously the bolt head engaging withthe shoulder at the front end of the cylinder 45 moved it against itsspring 58. When the opening in the strike plate 63 is reached the bolthead is projected thereinto by spring 33, as in Fig. 9, but thecylindrical member 45 is held at an inner position as previouslydescribed, as in Fig. 9, and as the parts will be as shown in Figs. 4and 5.

From the inside of the door the bolt may be retracted by engaging theoperating head 23 and turning the bar 22 clockwise. From the outside ofthe door the bolt may be retracted only by side of a door the one hav ngthe t mberher I! to at the, lock it. With such-key. bar 22. may a so berotated or rocked tcr-etract the; b lt t cpenthe door from. the. outide.

h n h do ris closed position and l ck d it. is impossibl to Work. thebolt. head 31 inward y fo example by insertion. o a kniiee ot r thinblade between the edss of the door and dc r'iamb so a to reach. the headendinov it. n ar y- Un r such, con ien th r ler at 63 ill be cated inthe. icrwalf upper branch. ,3 cf t e l t 5 caus ng a clockw se turningmove ment of the le e 4e abo t the piv t 50. and l fting the a ra lyturned linger 5.1 at he iron end f a m, 5.4 nto. the. rear cess Stat theowe sid oi he p ate 33 (Fi 4 uch urning of the lever so is accomplishedwh n he sp ing 58. is compressed and ac s upon the lever. 49 to t w h ip55 n e to mo nt recess 41 of the cyl n r member 45.

Wh n t e ar 22 isop rate ither by the key or head 23.. th fi st mo ementis to elevate t r a end port on o th leve lathe roller 3 p ss n fr m eicrwar branch slot 53 into h urved. slot 52 and caus n such, elevatiwhich is ufli e to l erthe fin er t. 51 t the position hown in Fi 5- andthus tree. the latch bolt for inward movement. A continu tion of r ng, mm n of th ar 2% and with a consequent rocking oi the parts 6| carriesthe roller at as through the s ot 52 to th position. as shown in Fig. 6.Substantially simultaneous with the moving o t. of t r ller ts from htor-war ranch s o 53 to s ot 52. said rolle en ag s a a s t e fr n e eof the fin er 3. the iollewin movement irom the his. 5 sition to that nFi 6 t e atch b l is retr ted thro h a f rcin of th fi er t5 -earwar lvby the r ar m vement o olle 63 en a ing therevnth. When the latch bo t:has been retrac e to th position shown in Fig. 6, or substantially atthe time that the finger (i5 comes. to the projection 55a of spring 6.5,the latch bolt head is iree, of the keeper or strike plate and the doormay be opened. If the door is opened and the bolt is res.

traoted o. further than. shown in Fig. 6., upon release of the key 11 oroperating head 23 the bolt head will be projected outwardly by thespring 53. to the position shown in Fig. 1 so that when the door isagain closed it is locked and cannot be opened from the outside exceptby use of the proper key l1.

It is however desirable and in fact essential that the locking bolt maybe retracted and held in retracted position, as in Fig. 8. This maybeaccomplished by a further operation elth'er by the key or head 23 towithdraw the bolt against the yielding force of the spring 65 to theposition in Fig. 8, in which the roller at 63 is carried to the rearupper branch slot 53 of slot 52 and seats therein. Upon such actionoccurring spring 58 again turns the lever 49 in a clockwise directionabout the pivot 50 and elevates the finger 51 into the front recess 39at the lower edge of the plate 33 so that the bolt cannot moveoutwardly, being held in fully retracted position by said finger 51. Therelease of the bolt from such position is by turning the key ll or head23 in a'reverse direction.

The recess at 41 in the rod 45 permits freedom of movement of the lever49, either by the spring 58 in one direction or by the action againstthe upper edge of slot 52 by the roller 63 in the opposite direction atall positions except when the lock bolt is projected outwardly with thedoor.

open. Under such condition as in Figs. 1 and '2, the cylinder rod 45being projected outwardly as shown, said rod has moved so that the lipat 56 is brought underneath and depressed by the rear end portion of therod, thereby moving the finger at 51 into an inoperative positioninsofar as it efiects th'e'lock bolt movement. Without such provisionthe spring 58 would turn the lever 49 in a clockwise direction and liftthe finger 51 into the rear recess 39 and the door could not be closedbecause the lock bolt could not be retracted upon engaging the strikeplate. The structure described provides for the rear inward movement ofthe lock bolt upon closing the door, inasmuch as the inner recess at 39will have been moved far enough to the right when lip 56 subsequentlyenters the recess 4! that the finger 51 will ride against the under sideedge of the part 40 between the notches or recesses 39.

From the foregoing it is apparent that a practical, foolproof, simple,durable and economically produced lock of the type desired has beenproduced and one which is easily manufactured and assembled and readilyinstalled upon a door.

The invention is defined in the appended claims and is to be consideredcomprehensive of all forms of structure coming within their scope.

I claim:

1. A lock comprising an elongated housing, a vertical plate fastenedWithin the housing between its ends,'a latch bolt comprising, a bolthead and a plate secured to and extending from the rear end thereof intothe housing, said plate lying against one side of said vertical plate,spring means for normally projecting the bolt in an outward direction,said housing having an opening to pass the bolt head, manually operablemeans for retracting the bolt against said spring means, and a lockingmember movably mounted on said vertical plate adapted to be brought intolocking engagement with said bolt plate to hold the bolt retracted whenmoved to its innermost position, and to hold the bolt at its outermostposition against retraction from outer end pressure against the bolthead, as specified.

2. In a latch construction, an elongated generally tubular housinghaving an opening in its outer end for the passage of a bolt, a vertical.plate secured within the housing, a latch bolt having a head passingthrough said outer end opening in the housing and a bolt plate securedto the inner end of the bolt head extending inwardly alongside saidvertical plate, manually operable means including a rocker membermounted within the housing on the sides thereof adapted to engage withsaid bolt plate to retract the bolt, spring means normally moving thebolt outwardly, a cylindrical member having at its front end portion asemi-cylindrical extension, said extension in length being substantiallyequal to the length of said bolt head and lying thereagainst at oneside, said opening in the housing permitting the outward passage of saidextension, a lever member pivotally mounted between its ends on thevertical plate having a rearwardly extending arm located alongside saidoperating rocker member and provided with a laterally turned ear aboveits pivot, spring means between said ear and the cylindrical membernormally tending to project the cylindrical member outwardly, saidcylindrical member having a recess between its ends at its under side,said lever having a forwardly extending arm lying alongside saidvertical plate, said arm at its upper edge having an upwardly turned liplocated underneath said cylindrical member and said forwardly extendingarm at its front end having a laterally turned finger, said bolt plateat its lower edge havin spaced apart upwardly extending recesses oneimmediately back of the bolt head and the other a distance to the rearthereof into which said finger may be moved when said upwardly turnedlip is below the recess in said cylindrical member.

3. A latch comprising .a housing having an opening in its front end, alatch bolt slidably mounted in the housing and projecting through saidopening, spring means for extending said bolt, manual means forretracting said bolt, and movably mounted locking means associated withsaid bolt and said manual means for locking the bolt in either extendedor retracted position and movable to inoperative position by said manualmeans.

4. The elements of claim 3 combined with a dead bolt slidably mountedadjacent said latch bolt and also acting to unlock said locking meanswhen extended and a single spring acting to both extend said dead boltand to thrust said locking means into locking position.

5. The elements of claim 3 combined with spring means acting to exertadditional resistance to movement just prior to final retraction of thelatch bolt.

ALBERT F. LICKTEIG.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 919,979 Towne Apr. 27, 19092,369,873 Voight Feb. 20, 1945

